10850
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 23808
- Proper Divisor Sum (Aliquot Sum)
- 12958
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 3600
- Möbius Function
- 0
- Radical
- 2170
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 161
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- 10-gonal (or decagonal) pyramidal numbers: a(n) = n*(n + 1)*(8*n - 5)/6.at n=20A007585
- a(n) = 1*t(n) + 2*t(n-1) + ... + k*t(n+1-k), where k=floor((n+1)/2) and t(n)=2*n+1 (odd numbers).at n=38A023865
- a(n) = (d(n)-r(n))/2, where d = A026046 and r is the periodic sequence with fundamental period (0,1,0,1).at n=36A026047
- Number of stereoisomers of all n-node acyclic hydrocarbons with no triple bonds.at n=9A036673
- Base 6 digits are, in order, the first n terms of the periodic sequence with initial period 1,2,2.at n=5A037547
- Numbers having four 2's in base 6.at n=30A043380
- Normalized extreme values for "3x+1" trees of depth n.at n=13A045474
- Numbers k such that the sum of the squares of the divisors of k is divisible by k.at n=25A046762
- Number of basis partitions of n+25 with Durfee square size 5.at n=31A053800
- Nonprimes which terminate in their sum of prime factors.at n=35A071173
- Pair the natural numbers such that the n-th pair is (k, k+p(n)) where k is the smallest number not occurring earlier and p(n) is the n-th prime. (1, 3), (2, 5), (4, 9), (6, 13), (7, 18), (8, 21), (10, 27), (11, 30), (12, 35), (14, 43), ... This is the sequence of the product of the members of every pair.at n=38A075316
- Riordan array (1/(1-x-x^2), x(1+x)/(1-x-x^2)^2).at n=48A112973
- Triangle read by columns: number of n-node (unlabeled) connected graphs with girth k, for n >= 3, k >= 3.at n=15A128042
- Number of n-node (unlabeled) connected graphs with girth 3.at n=7A128240
- Composite numbers n such that the sum of prime factors of n (counted with multiplicity) terminates n as a substring.at n=34A143993
- a(n) is the number k such that 2^(2k+1)-1 = A000668(n+1).at n=23A146768
- Sums of the antidiagonals of Sundaram's sieve (A159919).at n=29A159920
- Even almost practical numbers.at n=38A174534
- Numbers n such that 6n and 12n are both the average of twin prime pairs.at n=18A177680
- Sums of two successive primes s such that s+-3 are primes.at n=20A179485